If you want to maintain control over individual clips in DaVinci Resolve, you'll have to work with clips that have already had the frame rates conformed, and use them to replace the interpreted clips in your PP timeline.

Obviously this means you need to conform the clips in a different application, or in PP, exporting the clips and re-importing.

Interpret footage changes are only kept in Premiere. It will not change the actual files' framerate so Resolve won't find the timecodes you're using in Premiere. You could however do the same interpretation in Resolve's media pool before importing the XML.